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Supplemental Cash Flow Information - Net Effect of Changes in Our Operating Accounts and Cash Payments for Interest and Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Decrease (increase) in:        
Accounts receivable – trade     $ 1,725 $ (426)
Accounts receivable – related parties     3 2
Inventories     (101) 32
Prepaid and other current assets     (81) (96)
Other assets     23 62
Increase (decrease) in:        
Accounts payable – trade     26 (147)
Accounts payable – related parties     (37) (62)
Accrued product payables     (1,353) 305
Accrued interest     (248) (185)
Other current liabilities     (17) 52
Other long-term liabilities     (109) (100)
Net effect of changes in operating accounts     (169) (563)
Cash payments for interest, net of $147 and $82 capitalized during the nine months ended September 30, 2025 and 2024, respectively     1,260 1,180
Capitalized interest $ 49 $ 31 147 82
Cash payments for federal and state income taxes     $ 12 $ 19